Violet vat dyestuff and process of producing the same



Patented Jan. 10, 1928.

RICHARD HERZ, OF FRANKFORT-ON-THE-MAIN, AND KARL THIESS, F HOCHST-ON- THE MAIN-SINDLINGEN, GERMANY,

ASSIGNORS TO (ErRASSELLI DYESTUFF COR- PORATION, 0F NEW'YORK, N. Y., A CORPORATION OF DELAWARE.

VIOLET VAT DYESTUFF AND PROCESS OF PRODUCING THE SAME.

No Drawing. Application filed February 11, 1927, Serial No. 167,579, and in Germany February 19, 1926.

U. S. application Ser. 87,676,'filed on February 11th, 1926 relates to new violet vat dyestuffs of the 2-thionaphthene-2-indolindigo series corresponding probably to the 6 general formula:

x o o 0 0 v 5 \2C-=C2/ \R wherein R means an arylene residue; which may contain further substituents, and R means a halogen or an arylamino group. Dyestufis of particularly great valueare obtained by our new process by using an isatin body of the general formula:

halogen halogen wherein R means a halogen or an arylamino group. 0

The dyeings obtainable by the above defined indigoid dyestuffs are not only disthey possess, besides a good fastness to boi ing, very good fastness to light. The condensations are carried out-by one of the usual methods. Instead of the hydroxyhave m the reaction tinguished by their clear violet shades but thionaphthenes above referred to, there may also be used such derivatives thereof as belike the free oxythionaphthenes.

Analogues dyestuffs are produced by condensing the a-derivative of the j-dial lhydroxythionaphthenes instead of the oze-' rivatives of 4.7-dialkyl-5-halogenhydroxyv thionaphthenes and introducing subsequently the halogen in the 5-position by treating the said condensation products with a halogenating agent.

The following examples will serve to illustrate our invention but they are not intended to limit it thereto, all. parts being by weight: a y Y (1.) 21,6 parts of 5.7-dichlorisatin, are heated in 200 parts of chlorobenzene with 22 parts of phosphorus.pentachloride to 90 C. until the evolution of hydrochloric acid is complete. Into this solution of 5.7 -dichlorisatin-a-chloride are introduced 21,3 parts of 4.7- dimethyl -5- (in the form of The formation chlorhydroxy'thionaRhthene a paste with chlorobenzene). of thedyestufi sets in at once and is complete after heating for a short time.

' condensation is The Product of a lcohol. The new filtered and washed with dyestutf, having probably the formula:

oHr

and dyes the fibre from the vat very purev violet tints.

{2.) 17,8 parts of 4.7 dimethylhydroxythionaphthene are heated together with a solution of 24 parts of 5.7-dichlorisatin-achloride in chlorobenzene for 2-3 hours to 5060 C. The condensation product which separates is filtered and washed with alcohol. 37 ,6 parts of the dycstuff powder thus obtainedare introduced into 500 parts of sulfuric acid of 66 B., while cooling. After addition of 16 parts of bromine the whole is stirred for 2 hours, first with cooling and then it is gradually heated to 4050 C. which temperature is maintained until the evolution of hydrogen bromide is completed. The whole is then poured on ice to which some bisulfite has been added, filtered and washed until neutral. The resulting dyestuif resembles very much that obtainable according to Example 1 and gives on the fibre tints which are very similar to those produced according to Example 1.

(3.) 30,5 parts of 5.7-dibromisatin are heated with parts of phosphorus penta-' chloride in 300 parts of chlorobenzene and thus converted into 5.7-dibromisatin-a-chloride, which is then heated at 5060 C. with 212 parts of 5-chlor-at/T-dimenthylhydroxythionaphthene made up into a paste with some chlorobenzene, until the formation of the dyestuif is completed. The new dyestuil',

.having probably the formula:

01 00 oo Br 2C=C2 1 1 7 6 s J H: Br

is filtered and washed with alcohol. It forms a bluish-violet powder which is soluhle in concentrated sulfuric acid to a greenish-blue solution, dyeing the fibre from a yellow vat bright violet tints which are somewhat bluer than those obtainable according to Example 1. I

(4.) 21,6 parts of 5.7-dichlorisatin are converted according to Example 1 into thev 5.7-dichlorisatin-u-chloride which is then heated to 70 C. together with 25,6 parts of 5 brom 4.7 dimethylhydroxythionaphthene which has been previously made up into a paste. The dyestufi, after being separated, is filtered and washed with alcohol. Th5 new dyestuff, having probably the form a:

Br 0 O C 0 Cl 7 I l S S forms a bluish violet powder which is soluble in concentrated sulfuric acid to a green solution and dyes the fibre from the hydrosulfite vat bluish-violet tints.

(5.) 21,2 parts of 5-chlor-l.T-dimethylhydroxythionaphthene and 22.2 parts of isatin-a-anilide are introduced in about 200 parts of chlorobenzene or in a similarly acting solvent or diluent and the mixture is then heated for some hours while stirring until the formation of the dyestufi is finished. The dyestufi which separates when cold is alkyl A o 0 Big 4 g g 5 3 3 R E L! d 2 1 1 1 1. wherein R represents a substituted arylene residue.

2. As new products, the violet vat dyestuffs of the following composition:

Big

wherein R represents a substituted arylene residue.

As new products, the violet vat dyestutl's of the following composition:

HI H

wherein It represents a substituted arylene residue.

4. As new products, the violet vat dye.- stutfs of the following composition:

alkyl mg 0 o 5 5 3 a a 2!, 1,2 0

n 7 ii 2 t 7 I it 8 5. As new product, the violet vat dyestuffs of the following composition:

0 s g H18 3 u r 5 ZLSLQ 6 H d r t 7 o A an;

6. As new products, the violet vat dyestuffs of the following composition:

alkyl H ,1

8. As new products, the violet mt dyestuffs of the following composition:

9. As new products, the violet vat dyestuffs of the following composition o gT/ o1 5 3E 5 6 7 lej igy 10. Process of producing violet vat dyestuffs by condensing a. 4.7-dialkyl-5-halogenhydroxythionaphthene With a substituted isatin-a-derivative.

11. Process of producing violet vat dyestuffs by condensing a 4-7-di1netl1yl-5-halogenhydroxythionaphthene with asubstituted isatin-a-derivative.

12. Process of'producing violet vat dyestuffs by condensing a l-7-di1netl1yl-5-cl1lorhydroxythionaphthene with a substituted isatin-a-derivative. I

13. Process of producing violet vat dyestufis by condensing a 4-7-dialkyl-5-halogenhydroxythionaphthene with a 5.7-dihalogenisatin-m-derivative.

14. Process of producing violet vat dyestuffs by condensing a 4-7-dimethyl-5-halogenhydroxythionaphthene with a 5.7-dil1alogen-isatin-a-derivative.

15. Process of producing violet vat dyestufis by condensing a '4.7-dimethyl-5-chlor hydroxythionaphthene with a 5.7-dihalogenisatin-a-derivative.

16. Process of-prodncing violet vat dyestuffs by condensing a 4.7-dialkyl-5-halogenhydroxythionaphthene with a 5.7-dichlorisatin-a-derivative.

17. Process of producing violet vat dyestuffs by condensing a 4.7-di1nethyl-5-halogenhydroxythionaphthene with a 5.7-dichlor-isatin-a-derivative. e

18. Process of producing violet vat dyestufis by condensing a 4.7-dimethyl-5-ch1o1" ,hydroxythionaphthene u with a 5.7-dichlor isatin-arderivative.

In testimony whereof, we aflix our signa- KARL THIESS. 

